how much will it cost to replace a collapsed lifter, my car only has 15000 miles on 2003 Ford Explorer. can a collapsed lifter be repaired without disassembling the engine just passed smog no trouble codes just a noisy lifter. by rcguru46 in San Francisco, CA on December 24, 2013. Find a Shop.
Bohr developed the Bohr model of the atom, in which he proposed that energy levels of electrons are discrete and that the electrons revolve in stable orbits around the atomic nucleus but can jump from one energy level (or orbit) to another.
Not only did the Bohr model explain the reason for the structure of the Rydberg formula, it also provided a justification for its empirical results in terms of fundamental physical constants. The Bohr model is a relatively primitive model of the hydrogen atom, compared to the valence shell atom. As a theory, it can be derived as a first-order approximation of the hydrogen atom using the broader and much more accurate quantum mechanics and thus may be considered to be an obsolete scientific theory.